<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车确认" v-model="title" @keyup.enter="add">
    </div>
</template>

<script>
import { nanoid } from 'nanoid';

export default {
    name: 'MyHeader',
    props: ['addTodo'],
    data(){
        return{
            title:''
        }
    },
    methods:{
        add(){
            // 校验数据
            if(!this.title.trim()){
                return alert('输入不能为空')
            }
            // 将用户的输入包装成一个todo对象
            const todoObj = {id: nanoid(), title: this.title, done: false}
            // 添加todo对象
            this.addTodo(todoObj)
            // 清空输入
            this.title = ''
        }
    }
}
</script>

<style lang="less" scoped>
    /*header*/
    .todo-header input {
        width: 560px;
        height: 28px;
        font-size: 14px;
        border: 1px solid #ccc;
        border-radius: 4px;
        padding: 4px 7px;
    }
    .todo-header input:focus {
        outline: none;
        border-color: rgba(82, 168, 236, 0.8);
        box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
    }
</style>